Novel Viscoelasticity Measurement Method Based on AFM Force Mapping and JKR Analysis

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  • FUJINAMI So
    WPI Advanced Institute for Materials Research, Tohoku University
  • NAKAJIMA Ken
    WPI Advanced Institute for Materials Research, Tohoku University
  • NISHI Toshio
    WPI Advanced Institute for Materials Research, Tohoku University

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Other Title
  • ＡＦＭフォースマッピング測定とＪＫＲ解析を基にした新規粘弾性測定手法
  • AFM フォースマッピング ソクテイ ト JKR カイセキ オ モト ニ シタ シンキネンダンセイ ソクテイ シュホウ

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Abstract

The Johnson-Kendall-Roberts (JKR) elastic contact model has been mostly applied for the analyses of force-distance curve measurements. We employed an AFM force mapping measurement on natural rubber (NR)/butyl rubber (IIR) vulcanized blend. The force-distance curve fitted well to the JKR model on elastic NR and rigid zinc oxide region but did not on viscoelastic IIR region. We calculated the deviated areas surrounded by a JKR curve and a experimental plot and mapped them to two-dimensional image. The derived image emerged viscoelastic IIR region from other rigid or rubbery region. This deviation will be due to viscoelastic properties of the materials; the glass transition temperature of IIR is close to the measurement condition. While whole energy dissipation of a cycle of each force-distance curve is strongly affected by adhesive hysteresis, the method we proposed here is free from adhesion because it calculates a difference from the JKR theory, in which adhesion is taken into consideration.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 84 (6), 171-175, 2011

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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